Bolt-pointing machine



V n, Ul BUTLER, PENNSYLVANIA.

pplcation led Eieren l.,

thx-.t l, entre Gialle., residing the coenty o1? Butler and citi et the United iseful lni'irovezifents in liolt-lointl/lachine, of which improvements the Ytollowing is av specification.

My invention relates to the machinin` ot bolts, and more paftieularly to the turning oi' pointed ends upon bolts. Bolts `are Vformed 'forging trof; rolled'stoclt, and it is requisite to iiorm by a. cutting operation a truer -mint upon the end than can be rachieved in the general operations. 'lhe objects et my invention are simplicity ot structure and adequacy and economy in operation. ln co-pending application liled lune 6th, 1921, Serial No. 475,282, l describe and claim a niethod which is accomplished in the operation of the machine of this application., and in a third application tiled November 1922, Serial "nl 602,959, l describe and claim certain improvements in the machine itself.

The accompanyingdrawings show a machine in which my invention is embodied.

l is a view ot the machine in endelevation with certain parts brolren l" ll is a vieiv of itpartly in side elevat on, partly in vertical medial section; Figs. ,lll and lV are views to le L:er sca-le, showing; in troi'it and in side elevation the knife member.y and showing); in elevation and in section.v

parts With which the knife member is iin- ;nediately associated in assembly.

@n sha-'ft l, suitably mounted. and rotated from suitable source of power, Vis carried a drum 2. an interval trom, and opposite the periphery ot drum2, is mounted a sta tionary block 3. This block presents a concave cylindrical face to drum 2, and this face in its curvature is concentric with the cylindrical 'tace ot drum 2. The interval at Vwhich drum 2 and block 3 stand apart (an interval equal to the diameter oit the bolt to be pointed) may be nicely adjusted by securing block 3 to standard el by bolts 5, and forming; in blocks 3 radially extending,A slots 6 through which the securing` bolts 5 entend. This stendard (Which, as presently will appear, serves other and additional purposes) is arranged opposite drum 2 at one Iside. and at an interval trom drum 2.

lt is at the right-hand side, as shown in Fig.,

i927.. Serial No. 453,264.

block 3 around drum 2 amounts adn/an-4 taceonsly to appro?` mately 1800. ccordingly. in order to provide tor the adjustment desired, the block 3 is in this instance made in sections.

rllie space between drum 2 and block 3 constitutes a semi-circumterential slot a. llfhen the machine is assembled, it will be `understood that a bolt introduced into this slot and extendinp in the direction longitudinally ot the drum, will be simultanelv tangent to the opposite 'faces of drum ,lt will furthe/rabe understood thaV lo ation of drum 2 Within the lstationary block 3 will cause the bol-t lying between to roll, and as it 'rolls to advance along; the slot., in the direction in which the drum turns g' and it will be understood that the rate et advance ot the bolt relatively to block 3 viill be approximately one half the rate at which the surface of drum 2 turns, `relatively to bloclr lccordinofly.y each complete rotation of drum 2 will effect the advance oft a bolt substantially half Way round the drum-it being understood that block B is so arranged as to engage abolt .introduced between. throughout a halt circle.

lioosely mounted on shalt l, adjacent drum 2 on its rearward side, and extending ireelyinrough the opening; in standard d., is a hub and means are provided for turning' this hub i the saine direction vwith the shaft and at A pronimately halt the `speed at which shaft turns. `Such turning may conveniently be'eftected from shaft litself, byintergosed gearing, suc-h as indicated at e, 9, lo, n.

llrom hub .7 in the interval'betiveen drum 2 and standard extends an arm l2. This arm is pivoted to swing iny a vplane radial to the shatt-that is `to say, longitudinally of drum 2. The arm l2c'arries atits outer end cutting; mechanism. This cutting inechanism,y in the `tor-ui shown. consists oit a nlurality of knives l?? secured to and cana-ble ot adjustment in the enlarged block Withwhich arm l2 terminates. The position oit the knives will be understood on comparing; lll and lV. The length ot the arm is such that, when the' machine is assembled, the center ot the radiatingknives comes onposite the center ot slot o.. in Which the bolt rolls. A circular cam track lll is borne in standard l opposite that side ot arm l2 which is remote .from drum` 2, and arm 'l2v l is by virtue of its pivotal 'mounting upon sleeve Z held to bearing upon track 11iby a vspring 15 exerting tensionbetvveen arml and sleeve. A bearingroller 16 n'iay be provided.

will at proper time and `tt-proper rate ad vance with positive thrust toward Ythe slot 'inavhich the bolts advance.A will continue in advanced position7 and will ultimately at.

I proper time under spring tension recede.y

Slt has been said that a bolt introduced yinto slot 'a Wil?. advance approx-:imately half the peripheral speed at which drum .2 turns7 and it has also been explained that hub 7 (which carries arm 12) rotates at approximately half thespced of 1.

Since tl'ie radius from the center of turning; 2o"

- distancefrom the center of turning to the to the center of the cutter is equal to the centerof a bolt carried in slot c, the advance )fof the rolling bolt and of the cutter (rei volving labout sha'i' synchronous.'

Drum Qgis provided its periphery with 'pairs ofout-Wardiextending yielding fingers i7. vWhen the parts are assembled the a.. rangementis such that-as the machine oper* -ates fingers 17 carrya boit laid upon them into slot a at the verv instant when the ad-` vancing cutter'comes opposite theend'of j lthe slot.` immediately the bolt .is engaged bythe Opposites'urfa ,es of Vdrum and bloei;

and it thereafter is controlled in movement* by such engagement. he fingers i7 then yield under the pressure exerted upon them by the -bolt (they are borne by the drum "which, ashas been enplained,V advances atl twice the speed of bolt adva ce), they swing` aside, and advancing, 'pass l yond contact with thebolt. rllhey vthen resume their nor- VVhen a bolt is advancing along the semicirfcular slot @fingers 17 borne :by drum 2 make la complete revolution, and come to..

position agaim to carryan unpointed bolt 'into the receiving;` end of .the slot, at the lmomentv vWhen `the bolt` g (ncrv pointed) 'which they had previously introduced ,isv passing from the discharge end of thesiot.y vrlhe boltl may be laid on a lsupport from Which'is may be picked up by 'theiingers The ynumber of arms 12 may bemultiplied.

` l sbovv four, extending` at quadrant inter-4 vals.y Forcooperation with four cutters, two

pairs of fingers i7 are required. lThe slot then always Will containv tvvov bolts under treatment, and as a third is introduced the first is released. ln Fips. i and 1l"A l show.

f a yboltl 5 in position in the machine.

` ,Operation'is 'as follows; The partsbeing assembled as shoy'vn in "l ano.

the direction of'rotation is anti-clochiviseV (of. Fig. An'y unpointed boltis laid on t will be substantiall7V Vfiingfers 17 approaching; the lright-hand end of the slot. lilotation` of shaft lcarriesthe bolt into the slot. Where immediately it be gins rolling advance;travelling at half the speed at which thefsurfaceofdrum 2 turns. llingzgcrs 17 continue to advance at ,Y ar speed. Under thepressure so imposed uponA them. lingjgers if? swing aside and advancinp` pass beyond the bolt which they have brought" to position.` ll/leanvvliile7 as the bolt enters-the slot, a cutter has rcome opposite to thebolt, and this cutter continues to advance along` the slotl in lsynchronisin with theadvancing' bolt. is the cutter advances it swings toward and bears upon the end of the bolt. VThe 'rotating bolt, so engaged bythe relatively immovable cutter inni/es, i by its own rotation .cut and pointed.

et proper time the cutter recedes leaving the 7 to the other7 anda cutter arranged opposite` the slot forme'd by and between such sur-l faces and movable longitudinally v of the slot. 2. ln' a machine for pointing spindle- Tsha aed articles. means for rollino such -an articleV along' a...predetei'mined rollway, a cutter movable longitudinally of and lopposite such rollvvay.l `and means for causing the cutter to swingvlaterally in 'the'. course" of .such advance. '1 i v Ilin `a machineyfor vpointing spindleshaped articles the combination ofalrotary` drum, @a concave vcylindrical f surface ar rangedo'pposite and para.llelvvith and at-an 1. in a machine for pointing {spindle-H interval from theconveX cylindricalr surface` 1 of said drumya'ndfa. lcutter arrangedA atl one side and movable'rop'posite"the 'slot formed 'by and .between `drumand opposite surface substantially as described. J i I 'f li.' lnv a machine for pointingspindleshaped articles the combination of a rotary drum, av concave cylindrical surface arranged opposite and parallel with and at an interval from the convex i cylindrical sur- -face ofk said drum, a cutter arranged at one side opposite the slotl yformed by and betweenthe ysaid drum and 'opposite surface and movable longitudinally of ysaid slot.v

and'meansfor causing;y the cutter to. swing,` vlaterally as it advances,substantially as described.'

5. ln a bolt-pointingA machine, meansfor iroling a boit along a surface, a cutter, ineens for Causing 'the outtei to advance synehronousy with 'the rolling bolt, and ilo-i' causing 'the cutter to swing as it advances toward the rolling bolt, substantially as desoribed.

6. in maehine oin pointing spindleshaped articles the combination of a i'o'ayy di'uni, a concentric drum-surrounding block ai'ravnged at an interval 'from said ii-um., cutter mounted on si common axis with said drum and extending opposite the so formed by and between drum anni, Mooi; and Ine-ans foi driving drum and outer at speeds of tunning o? two to one, substantially as desebed.

In testimony Whei'eo l have hereunto set my hand.

JAMES CRlG.

`Witnesses:

GEORGE T. CRAM;5 FRANCIS J. ToMAssoN. 

